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frutty [35]
2 years ago
10

Measurements were taken from snails of the shell weights and the widths of the opercula. Plot a graph of opercula width (y-axis)

versus shell weight (x-axis). Estimate the correlation coefficient and test to see if there is a significant association shell weights and the widths of the opercula. Use a 5% level of significance.
Opercula width
Shell weight (g) (mm)
12 10.1
10 9.0
7 5.5
14 9.9
11 8.3
8 8.5
10 8.0
9 6.4
6 6.2
13 8.1 2.306
Mathematics
1 answer:
joja [24]2 years ago
5 0

Answer:

Yes,there is a significant association shell weight and the widths of the opercula

Step-by-step explanation:

Using a correlation Coefficient calculator :

Given the data above :

The Coefficient of correlation(r) obtained is :

0.7632

Obtaining the test statistic :

T = r² / √(1 - r²) / (n - 2)

T = 0.7632² / √(1 - 0.7632²) / (10 - 2)

T = 0.58247424 / 0.2284528

Test statistic = 2.550

The Pvalue from r score , N = 10

Pvalue(0.7632, 10) = 0.01022

α = 0.05

If Pvalue < α ; reject H0

Pvalue < α ; We conclude that there is a significant association shell weights and the widths of the opercula

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Ahat [919]

Answer:

The soda costs 2.20 and the sandwich costs 7.70

Step-by-step explanation:

To find this, set the soda cost as x. We now know that the sandwich cost is 3.5x. Add these together and set equal to 9.90

x + 3.5x = 9.90

4.5x = 9.90

x = 2.20

This is the cost of the soda. Now we can multiply that by 3.5 to get the sandwich cost.

3.5 * 2.20 = 7.70

7 0
3 years ago
Rounded to the nearest inch , what is the appoxiomate circumference of a circle with a diameter of 40 inches (Use pi = 3.14
sweet-ann [11.9K]
С = πD 
С = 3,14×40
С = 126 in ← <span>to the nearest inch </span>
3 0
3 years ago
5x increased by 120%
Vlad [161]

"Increased by" means to multiply.

First, change the percentage to a number.

% ⇒ # : %/100

120(%) (120 ÷ 100) = 1.2

Now, you multiply.

5x × 1.2 = 6x

So, your answer is 6x.

3 0
3 years ago
Some equations have the form y=kx, where k is a number. Which equation CANNOT be written in the form y=kx?
kumpel [21]

Answer:

Any equation of the form

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Step-by-step explanation:

For example

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5 0
3 years ago
Read 2 more answers
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melisa1 [442]

Answer:

45/28

Step-by-step explanation:

Hey There!

They want us to find the tangent of R

Remember in sohcahTOA

t - tangent

o - opposite

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The opposite of angle r is 45

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8 0
2 years ago
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